Lettering pen



Aug. 21, 1923.

E. E. EVANS LETTERING PEN Filed Nov. 15,

Patented Aug. 21, 1923.

UNITED STATES E'MBYB E. EVANS, 0F BTREATOB, ILLINOIS.

LETTERING PEN.

Application filed November 16, 1922. Serial No. 601,826.

To all whom it mag concern Be it known that I. EMRYS E. Evans, a citizen of the United States, and a resident of Streator. in the county of La- Salle and State of Illinois, have invented certain new and useful Improvements in Lettering Pens, of which the following is a specification.

My invention relates to fountain lettering pens, and it is my purpose, generally speaking, to provide an improved pen of this type that is efficient for its purpose, and that is embodied in a simple construction consisting of a minimum number of parts that may cheaply and easily be produced and assembled.

My improved pen includes, essentially, an ink reservoir, a writing tip, and a valve mechanism to control the flow of ink from the reservoir to the writing tip, and it is my further purpose to provide a pen embodying these structural characteristics in which the valve mechanism is effective to break up and eliminate clogging of the ink whereby it will flow continuously and evenly to the writing tip when the pen is in use.

It is also my purpose to provide a pen of the type mentioned that may readily be disassembled for cleaning purposes, and that is of such construction that any one ofa number of different writing tips may quickly and easily be associated therewith without disturbing the other parts of the pen.

With the foregoing and other purposes in view, my invention consists in the novel features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawings and defined in the appended claims.

In the drawings wherein like characters of reference denote corresponding parts in the different views- Figure 1 is a side elevation of afountain lettering pen embodying the novel and essential characteristics of my invention;

Figure 2. a vertical section through the valve chamber. writing tip and valve, showing the normal relation of these parts;

Figure 3, an end elevation of the cap for closing the filling opening of the reservoir; and

Figure 4, a view in side elevation of a plurality of different writing tips adapted to be used with my improved pen.

Referring now to the drawings in detail 10 designates a tubular valve chamber that is closed at one end and open at the other and that has extending angularly therefrom and communicating therewith through a restricted passage 11, a hollow handle 12 constituting a reservoir for the writing fluid to be supplied through said passage to the valve chamber. The outer open end of the handle is closed normally by a cap 13 that 15 adapted to be removed to permit filling of the reservoir and one side of this cap is cut away as at 14 or formed in any other suitable manner to vent the reservoir whereby the writing fluid may flow unhampered from the handle into the valve chamber.

The valve chamber 10 is interiorly screw threaded at its open end to receive the exteriorly threaded nipple portion 15 of a writing tip 16 which latter is provided with an axially extending opening 17 and at its free or lower end terminates in a flat or substantially fiat writing face or surface 18. A plurality of writing tips 16 are provided for use with my pen and all of them, in essential particulars, are of duplicate construction whereby they may be interchangeably fitted in the valve chamber of the pen. Their writing surfaces, however, vary in size as clearly indicated in Fig. 4 of the drawings and if desired they may also be varied in shape, so that by selecting a proper tip and attaching it to the pen. lines of practically any desired style and width may be formed.

As is understood, the writing fluid fed to the valve chamber 10 from the reservoir in the handle 12 is adapted to flow smoothly and uniformly to the writing surface 18 of the tip 16 during use of the pen and, of course, such flow must be cut off when the pen is not in use. Therefore, in order to control the flow of the writing fluid to the writing surface I have provided a valve 19 that normally is held seated against the inner end of the tip 16 in closing relation to the openin 17 therein by an expansion coil spring 20 gm bears at one end against the valve and at its other end against the closed end of the valve chamber, and that carries a stem 21 that extends through the opening 17 and normall protrudes slightly beyond the writing sur ace of the tip, so that when slight pressure is exerted on the pen to move the writin face 18 against a surface to be marked, said stem is moved inwardl there by to unseat the valve and permit t e writ ing fluid to flow from the valve chamber through the 0 ning 17 and to the writing surface. Pre erably the opening 17 is slightly larger in diameter than the stem 21 in order to permit such flow of the writin fluid but if desired the stem ma be fitted neatly within the opening for sli ing movement and either the stem or openin or both may be ribbed to gain the same resu t. Thus it is apparent that when the pen is disposed with its writing face against asurface to be marked, writing fluid immediately begins to flow to the writing face, and as the writ ing face is moved over the surface being marked the flow of writing fluid is maintained constant because of the valve being held open and substantially uniform because of the narrow passage for the fluid between the stem 21 and the wall defining the passage 17. Furthermore, the sprin 20 is effective to close the valve and cut 0% the supply of writin fluid immediately the pen is removed from t e surface bein marked, and due to the fact that the spring, and an inwardly disposed portion 22 of the valve that forms a guide for the sprin extend across the passage 11, it is mani est that operative movements of the valve, its stem, and the spring 20 are efiective to break up and eliminate clogging of the writing fluid, particularly at the point where it enters the valve chamber and around the stem 21 whereby it will flow evenly to the writing tip.

From the foregoin description considered in connection with-t e accompanying drawings it is believed that the construction, operation and advantages of my improved lettering pen will be fully understood and while I have herein shown and described one specific embodiment of my invention I do not limit myself to the structural details shown, except for such limitations as may be included within the appended claims.

I claim 1. A lettering pen including a valve chamber closed at one end and open at the other, a hollow handle extending at an angle from and communicating with said valve chamber and constitutin a reservoir for writing fluid to be suppli thereto, a writing tip detachably associated with the open end of said valve chamber, a valve adapted to seat against the inner end of said writin tip to control the flow of writin fluid to t e writing surface of said tip, an a spring bearing at one and against the closed end of the valve chamber and at its other end against thevalve and acting to hold the latter normally seated.

2. A lettering pen including a valve chamber closed at one end and open at the other, a hollow handle extending at an angle from and communicating through a restricted passage with said valve chamber and constitutin a reservoir for writing fluid to be supplie thereto, a writing tip detachably associated with the open end of said valve chamber, a valve adapted to seat against the inner endof said writing tip to control the flow of writing fluid to the writing surface of said tip, and a spring barin at one end against the closed end of the va ve chamber and at its other end against the valve and acting to hold the latter normally seated, said valve and spring extending across the restricted passage providing communication between the reservior and the valve chamber whereby operative movements of the valve and its spring are effective to prevent cloggin of the writing fluid adjacent to said restr cted passage.

3. A lettering pen inc uding a valve chamber closed at one end: and open at the other, a hollow handle extending at an angle from and communicating through a restricted passagewith said valve chamber and constitutin a reservoir for writing fluid to be suplied thereto, a plurality of writing tips iiavin writing surfaces of different sizes, saidtips adapted for detachable and interchangeable connection with the valve chamber, and a valve mechanism to control the flow of writing fluid from the valve chamber to the writin surface of a tip operatively connected wit said valve chamber.

In testimony whereof I hereunto aflix my signature.

EMRYS E. EVANS. 

